Hi,
Sorry for my mistake,
someone defined vol to *(pVol), so the code is OK.
2009/7/24 阎淼 <yanmiaobest@xxxxxxxxx>:
> Hi,
>
> I am using GCC 4.1.2 on a project, the prototype and definition of a
> function is mismatch, but the programs
>
> compiles and works fine, how GCC compiles following code and checks
> the prototype ?
>
> in file a.h :
>
> typedef struct {...} struct_b;
>
> extern int func_A ( struct_a * socket, struct_b * flash);
>
> in file a.c:
>
> #include "a.h"
>
> int func_A( struct_a * socket, struct_b vol)
> {
> .....
> vol.read = read;
> vol.write = write;
> .....
> return 0;
> }
>
> and another file b.c:
>
> #include "a.h"
>
> int func_B(.....)
> {
> struct_b flash;
>
> func_A( ..., &flash);
>
>
> flash.read(xxx);
> }
>
>
> GCC compiles this piece of code without warnings, and it works fine.
> But there is a mismatch between declaration and definition of
> func_A,
>
> should there be a warning ? I compiled the code with -ansi and -Wall
> options. And when I changed the prototype to
>
> extern int func_A ( struct_a * socket, struct_b * vol), GCC gives
> a error saying conflicting types of func_A.
>
>
>
> Best Regards!
> Miao Yan
>
